BMW M5 Forum and M6 Forums banner

1 - 11 of 11 Posts

·
Registered
Joined
·
19 Posts
Discussion Starter #1
Well I finally got to the dyno to tweak my moded engine that I rebuilt 2 years ago. Wow time flies.

This engine has CP pistons and rings that are 11:1 (approx)
The exhaust side of the head was cleaned up. (ported)
The cams are from a S38 B36 M5 engine (E34) and are at factory settings. No ****** or advance.
Stock rods, crank and valves.
Euro headers.
Miller MAF and tunable WAR chip.
UUC exhaust and VSR1 Cats.
Stock ignition, injectors and FPR.

With the high compression we had to remove some advance from the GENII Miller MAF chip to prevent detonation.
But because this engine breathes so well the output was right near my target. I was hoping for 300RWHP.
As you can see from the Dyno graphs I got 294.57 RWHP and 258.42 torque.



This was on a Dynojet at Balanced Performance in Sugar Hill GA and was tuned by Ed Senf a professional tuner that is currently the tuner for the Rum Bum BMW Continental Tire car. Has also done Bimmer World and some Turner BMW's.

The drivetrain loss percentage they use for this vintage BMW and the Dynojet is 17%. Run those numbers and you get
344.64 HP at the crank and torque is 302.35
I'm pretty happy with that for a normally aspirated engine.
This is really just an M88 Euro with better pistons and some head work with modern maf and tuning.

Here's the link to a video on the dyno.
You are hearing the UUC exhaust too.
http://www.youtube.com/watch?v=bhHOvq3FSTs
 

·
Registered
Joined
·
486 Posts
Any pics of your car??

Nice post, thanks for the HP information I wonder how the engines respond to mods.
 

·
Registered
Joined
·
19 Posts
Discussion Starter #3
Here's one from Vintage at the Vineyards last May.
I'll find an engine shot tomorrow.

 

·
Registered
Joined
·
907 Posts
No kidding! Impressive!
 

·
Moderator
Joined
·
10,458 Posts
very nice. That must really move in an e28! Only about 30whp down from what my e39 was stock, and it was not slouch.
 

·
Registered
Joined
·
19 Posts
Discussion Starter #9
Thanks for all the compliments guys. It really is fun to drive. :M5launch:

Yes Zimmie they will rev to 7400 or more.
I was still seeing a power increase at 7000 where the rev limiter is set.
Next time on the dyno I will try going to 7200-7400.
A well known BMW engine builder told me they can do this easily.
I promised a engine picture so here it is.

 
  • Like
Reactions: Tyson1868

·
Registered
Joined
·
940 Posts
That's one impressive looking powerplant.
Very clean, and the gloss black cam cover and induction plenum are a nice touch.
 
1 - 11 of 11 Posts
Top